Pipe and header joint



c. H. TRUE PIPE AND HEADER JOINT May 31, 1932.

Filed Sept. 10, 1929 III IHII INVENTOR -C//ARLE$ TRUE ATTORNEY PatentedMay si, 1932 marsh STATES or new YORK;

PIPE AND HEADER Jo ns.

Application filed September 10, 1929. Serial No. 391,526.

This invention relates to means for securing pipes to walls such forexample as tubular superheater elements or units to the superheaterheaders. Its purpose is to provide more satisfactory means of this kindthan have been available heretofore.

The invention is illustrated in the drawing herewith.

Referring to this drawing, a portion of the wall of a superheater headeris shown at 1. Two of the pipes to be connected to the header are shownat 2-2. Thimbles 3-3 are secured in any preferred steam-tight manner inthe wall, extending through it, the interior .1 of the pipescommunicating with the inside of the header through these thimbles. Eachpipe has formed on it a collar 4 some distance from the end which is tocommunicate with the header. it the end of the pipe the material of thepipe is turned outward and back on itself for a certain distance, thisturned-back portion being shown at 5. Instead of turning back thematerial of the pipe itself in the way indicated, a separate ferrule canbe slipped on the end of the pipe and the two integrally connected atthe end so that the resultingstructure is the same as that made by theprocess described, a sleeve in each case surrounding the pipe near itsend, the pipe and sleeve being integrally united adjacent to their ends.The outer or lower end of the turned-back portion 5 is chamfered so asto have a sharp edge spaced from the pipe itself as shown.

This ferrule or turned-back portion 5 fits closely into the downwardlyextending collar 6 of thimble 3. The end of pipe 2 bears against a seat7 in the thimble 3. The collar 6 is of such length as to bring its outerend as far below the header wall as the end of the turned-back portion5. The collar is chamfered as shown in the figure in such a manner thatit has a sharp edge juxtaposed to that of the turned-back portion 5.

There are shown in the figure two such pipe ends. The one at the leftillustrates the parts as so far described, the assembly beingincomplete. To complete it, the two sharp edges are welded together asshown at the right. The weld is preferably made with an orgy-acetylenetorch, only the extreme edges being'wel'ded', as this weld is' 'notintended for withseat 71 The means 'fon'this purpose preferre'd'byme'arethoseillustratedin the figure. Albbltdwith a head lO lying in the slot11 extends through a clamp 12, this clamp has openings 13 through whichthe pipes 2 2v extend." On 'tlhe'- clamp rest the two washers"141et'which engage the annular abutnients or collate Main-nut 15 on'thelower end of 'the'b olt 9 pulls the clamp"12' and. as a consequencetlie'fpipe ends '2'-2"to-' wardthe header." The upperenids of the pipeends are thereby pressed-firmly against thefsea't 7 7 Q In" the drawingthepipe "e ds are shown as spherical segments; This is" not essential asI do not depei'id' upon'this joint for'tightness. Iiglitnessisprovidedentirely y thal 8 p i a "Theasfsembly described can bedismantled and reassembled repeatedly To dismantle it tlie'sealto bebroken. This readily done ayacfomp'aratively' slight scraping- 'orfiling'along the'edge. Thetwo can be again welclecltogethei' and thebreaking welding'can be repeated several times before theedg 'becomesworn too much for further repe tition of the process; Thechainferingofthe collar '6 and the "turned-bahkpoitio'n 5cai1 then berepeated so that new sharp edges'are presented 'The "dismantling andre-assembling can thus be repeated for a great many times. I

The thimbles 3 are used when the material of the wall 1 is such that itcannot readily be welded to the material of the tube. This would be thecase when the header is of cast iron. The thimble is made of steel of acomposition to make it easily weldable to the ipe.

If the material of the header 1 is such that the collar 6 can be formeddirectly from it and can readily be welded to the pipe there will be nothimble and the collar will be unitary with the header.

Obviously variations can be made in the invention without departing fromthe spirit of the subioined claims.

I claim 1. In apparatus of the class described the combination of ametal wall having an aperture, a seat encircling one end of said aper- 6ture, a collar surrounding the seat and extending outward from the wall,a pipe, a sleeve encircling it, pipe and sleeve being integrally unitedaround their circumference adjacent to their ends, said integrally unit-10 ed portions engaging said seat, the configuration of the parts beingsuch that the outer ends of the collar and the sleeve are juxtaposed,said ends being welded together, and means to force the pipe and ferruleto the seat.

' 2. In apparatus of the class described the combination of a metal wallhaving an aperture, a seat encircling one end of the aperture, a collarsurrounding the seat and extending outwardly from the wall, a pipehaving its wall turned outward and back on itself for a certain distanceat its end, the end of the pipe engaging the seat, the configuration ofthe parts being such that the outer ends of the collar and theturned-back ortion of the pipe are juxtaposed, said ends being weldedtogether, and means to force the pipe end to the seat.

3. pparatus in accordance with claim 2, 3 the turned-back portion andcollar being oppositely chamfered to form sharp adjacent edges, thewelding together of the two parts being along these edges.

4. In apparatus of the class described, the combination of a cast ironheader, a nipple secured in said header, said nipple having a shoulderedaperture through it and having a collar extendlng outwardly from theheader, a pipe having ts Wall turned outward and back on itself for acertain distance at its end, the end of the pipe engaging said shoulder,the ends of the collar and turned back parts being chamfered to formsharp adjacent edges, the edges being welded together, and means toforce the pipe end against the shoulder.

CHARLES H. TRUE.

